Addition of dialkylhalogeno-hydridosilanes to unsaturated hydrocarbon compounds

Abstract

In the addition of an unsaturated compound into a silane of the formula R.sub.1 R.sub.2 SiXH wherein X is Cl or Br, and R 1 and R 2 each independently is an alkyl, aryl or aralkyl radical with up to 20 C atoms, or an alkenyl or alkinyl radical with up to 12 C atoms, the improvement which comprises effecting the addition reaction in the presence of at least one of aluminum chloride, aluminum bromide, aluminum oxychloride and aluminum oxybromide.

What is claimed is: 
     
       1. In the addition of an unsaturated compound onto a silane of the formula   R.sub.1 R.sub.2 SiXH     wherein   X is Cl or Br, and   R 1  and R 2  each independently is an alkyl, aryl or aralkyl radical with up to 20 C atoms, or an alkenyl or alkinyl radical with up to 12 C atoms, the improvement which comprises effecting the addition reaction in the presence of at least one of aluminum chloride, aluminum bromide, aluminum oxychloride and aluminum oxybromide.     
     
     
       2. A process according to claim 1, wherein the silane is dimethylchlorosilane. 
     
     
       3. A process according to claim 1, wherein the unsaturated compound is at least one of 2-methylbut-1-ene and 2-methylbut-2-ene. 
     
     
       4. A process according to claim 3, wherein the silane is dimethylchlorosilane, the temperature is between about -30° and 60° C., and the aluminum compound is aluminum chloride present in about 0.01 to 5% by weight of the reaction mixture. 
     
     
       5. 1,2-dimethylpropyl-1-dimethylchlorosilane.